Security protocols are critical for protecting modern communication infrastructures and are therefore subject to thorough analysis. However practical implementations of these proto...
In this paper we discuss the adaptive User Model component of the AthosMail system, and describe especially the Cooperativity Model which produces recommendations for the appropria...
CAPTCHA is a standard security technology that presents tests to tell computers and humans apart. In this paper, we examine the security of a new CAPTCHA that was deployed until v...
Denial of Service and Distributed Denial of Service attacks have cost millions of dollars to online companies. Unfortunately, these attacks are particularly di cult to stop since ...
Thomas W. Doeppner, Philip N. Klein, Andrew Koyfma...
A wide spectrum of certificate revocation mechanisms is currently in use. A number of them have been proposed by standardisation bodies, while some others have originated from aca...
John Iliadis, Diomidis Spinellis, Dimitris Gritzal...